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57711-41-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 57711-41-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,7,1 and 1 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 57711-41:
128 % 10 = 8
So 57711-41-8 is a valid CAS Registry Number.



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 16, 2017

Revision Date: Aug 16, 2017


1.1 GHS Product identifier

Product name β--estradiol di-TBDMS-ether

1.2 Other means of identification

Product number -
Other names (8R,9S,13S,14S,17S)-3,17-Bis-(tert-butyl-dimethyl-silanyloxy)-13-methyl-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthrene

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:57711-41-8 SDS

57711-41-8Downstream Products

57711-41-8Relevant articles and documents

Pd(0)-mediated cross coupling of 2-iodoestradiol with organozinc bromides: A general route to the synthesis of 2-alkynyl, 2-alkenyl and 2-alkylestradiol analogs

Mohanakrishnan, Arasambattu K.,Cushman, Mark

, p. 1097 - 1099 (1999)

Treatment of 3,17-O-bis(tert-butyldimethylsilyl)-2-iodoestradiol with in situ-generated organozinc bromides in the presence of a catalytic amount of Pd(PPh3)4 as a Pd(0) source led to efficient displacement reactions.

Copper-Catalyzed Direct C-H Alkylation of Polyfluoroarenes by Using Hydrocarbons as an Alkylating Source

Xie, Weilong,Heo, Joon,Kim, Dongwook,Chang, Sukbok

supporting information, p. 7487 - 7496 (2020/08/06)

Construction of carbon-carbon bonds is one of the most important tools in chemical synthesis. In the previously established cross-coupling reactions, prefunctionalized starting materials were usually employed in the form of aryl or alkyl (pseudo)halides or their metalated derivatives. However, the direct use of arenes and alkanes via a 2-fold oxidative C-H bond activation strategy to access chemoselective C(sp2)-C(sp3) cross-couplings is highly challenging due to the low reactivity of carbon-hydrogen (C-H) bonds and the difficulty in suppressing side reactions such as homocouplings. Herein, we present the new development of a copper-catalyzed cross-dehydrogenative coupling of polyfluoroarenes with alkanes under mild conditions. Relatively weak sp3 C-H bonds at the benzylic or allylic positions, and nonactivated hydrocarbons could be alkylated by the newly developed catalyst system. A moderate-to-high site selectivity was observed among various C-H bonds present in hydrocarbon reactants, including gaseous feedstocks and complex molecules. Mechanistic information was obtained by performing combined experimental and computational studies to reveal that the copper catalyst plays a dual role in activating both alkane sp3 C-H bonds and sp2 polyfluoroarene C-H bonds. It was also suggested that the noncovalent π-πinteraction and weak hydrogen bonds formed in situ between the optimal ligand and arene substrates are key to facilitating the current coupling reactions.

Preparation of vinyl silyl ethers and disiloxanes via the silyl-heck reaction of silyl ditriflates

Martin, Sara E. S.,Watson, Donald A.

supporting information, p. 13330 - 13333 (2013/09/24)

Vinyl silyl ethers and disiloxanes can now be prepared from aryl-substituted alkenes and related substrates using a silyl-Heck reaction. The reaction employs a commercially available catalyst system and mild conditions. This work represents a highly practical means of accessing diverse classes of vinyl silyl ether substrates in an efficient and direct manner with complete regiomeric and geometric selectivity.

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